- Normal situation if ambient temperature is very low.
- Too little refrigerant quantity, 70-75% less. check for
leaks.
- (V) Expansion valve stuck partially closed or
blocked
- (V) Clogging in the H.P. or L.P. branch between
filter and evaporator.
- Blockage in the H.P. branch between compressor
and condenser-filter hose, but before the H.P.
reading point.
Normal situation if ambient temperature is very high.
- Excess refrigerant charge, 30-5% more.
- Condenser overheated.
- Air present in the A/C system.
- (V) Compressor displacement regulator valve
defective.
- Blockage in the H.P. branch between compressor
and condenser filter hose, but after the H.P. reading
point.